Improvement in clock-pendulums



H. CAMP. Glock-Pfanduluml No. 221,213. Patented Nov. 4,1879.

N-FETEFS, PHOTO-LITHOGRAEHER. wASmNGToH. D C.

UNITED STATES PATENT OFFICE.

HIRAM CAMP, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO THE NET HAVEN CLOCK COMPANY, OF SAME PLACE.

IMPROVEMENT IN CLOCK-PENDULUMS.

Specification forming part of Lettcrs Patent No. 221,213, dated November 4, 1879; application tiled October 2, 1879.

To all whom it may concern:

Be it known thatl, HrnAM CAMP, of New Haven, in the countyot' New Haven and State ot' Connecticut, have invented a new Improvement in Clock-Pendulums 5 and I do hereby declare thc following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part ot' this specification, and represent, in-

Figure 1, a front view; Fig. 2, a rear view.

This invention relates to an improvement in that part of a clock-pendulum commonly called the bob7 In the usual construction the bob is placed upon the rod and adjusted by means ot a nut below the pendululn, so that by turning the nut either to the right or left the bob will be aised or lowered accordingly. While the adjustment is of the simplest possible character, comparatively few persons know which way to turn the nut to produce the desired result, or to what extent to turn the nut.

The object of this invention is to combine, with the common adjusting; device, an indicator which will show not only which way the nut is to be turned, but will also indicate to what extent it is turned; and the invention consists in the construction, as hereinafter described, and particularly recited in the claim.

A represents the body of the bob, which may be of any desirable shape or design. On the face is a dial, B, graduated or divided so as to show regular divisions, and on a shaft in the center is a pointer, C, arranged to be turned around the dial. On the dial, at one side ofthe zero-point, is the word Fast, and on the opposite the word Slow,77 or other marks,indicatin g that if the pointer be turned in one direction the result will be to cause the clock to run faster, and in the opposite direction to run slower.

On the back of the pendulum is a vertical slide, l), arranged in suitable guides a, and provided with a toothed rack, b, working in a pinion, d, on the pointer-shaft. Thelowcr end of the slide D is provided with a threaded spindle, E, and corresponding nut F, substantially as pendulums ot' common construction, and so that the bob will rest upon the nut, as shown. The upper end ot' the slide is provided with a loop, H, or other means for attachment to the rod.

By turning the nut the bob is accordingly raised or lowered, and in such movement the pinion engages the rack b, and so that it is rotated and accordingly turns the pointer C. This movement ot' the pointer not only indicates the result which will follow the movement. 'ot' the bob, but will show what was the extent ot` that movement, so that subsequent adjustments may be governed by the first mo vement-that is to say, the first adjustment, being a certain number ot points, produces a result which is determined by the subsequent running ot' the clock, and if the proper adjustment is not attained, the first result being known, the second adjustment is easily proportioned to the first.

I do not broadly claim a dial and indicator on a pendulum-bob; but

What I do claim is- The combination of the bob with dial and pointer arranged thereon with vertical slide engaging with apinion on the pointer-shaft and au adjusting-nut on which the bob rests, substantially as and for the purpose described.

HIRAM CAMP.

Witnesses:

E. E. KIMBERLY, H. H. CHAMBERLAIN. 

